The Fluorescent Tube T5 54w 865 with a G5 cap. This lamp has a 24,000-30,000 hour life and is rated at 54w watt. The lamp produces a colour output of 6500K (Kelvin) - 865 - Daylight. Your current product may have one of the following printed on it: GE; GE F54W/T5/865/LL Polylux - 90276, OSRAM; Osram FH54W/865HO - T5 LUMILUX HO, PHILIPS; Philips MASTER TL5 HO 54W/865, or SYLVANIA; Sylvania FHO 54W/865 - 0002783. The lamp is classified as a Linear Fluorescent product. See the Additional Information tab below for the full specification on the Fluorescent Tube T5 54w 865.